A list of 10 of them

Craigslist (styled craigslist) is a classified advertisements website with sections devoted to jobs, housing, personals, for sale, items wanted, services, community, gigs, résumés, and discussion forums.

eBay Inc. is an American multinational internet consumerto-consumer corporation, headquartered in San Jose, California. It was founded in 1995, and became a notable success story of the dot-com bubble; it is now a multi-billion dollar business with operations localized in over thirty countries. The company manages eBay.com, an online auction and shopping website in which people and businesses buy and sell a broad variety of goods and services worldwide. In addition to its auction-style sellings, the website has since expanded to include "Buy It Now" standard shopping; shopping by UPC, ISBN, or other kind of SKU (via Half.com); online classified advertisements (via Kijiji or eBay Classifieds); online event ticket trading (via StubHub); online money transfers (via PayPal) and other services

This website is for a summer music camp where you can go for a few weeks and produce your own music, make a band, and make music videos.

Google Inc. is an American multinational corporation specializing in Internet-related services and products. These include search, cloud computing, software and online advertising technologies. Most of its profits are derived from AdWords.

Yahoo! Inc. is an American multinational Internet corporation headquartered in Sunnyvale, California. It is globally known for its Web portal, search engine Yahoo
Search, and related services, including Yahoo
Directory, Yahoo Mail, Yahoo News, Yahoo
Finance, Yahoo Groups, Yahoo
Answers, advertising, online mapping, video sharing, fantasy sports and its social media website. It is one of the most popular sites in the United
States. According to news sources, roughly 700 million people visit Yahoo websites every month. Yahoo itself claims it attracts "more than half a billion consumers every month in more than 30 languages."

Valve is an American video game development and digital distribution company based in Bellevue, Washington, United States. Founded in
1996 by former Microsoft employees Gabe Newell and
Mike Harrington, Valve became famous for its critically acclaimed Half-Life (released in 1998) and Portal sub-series (released in 2007). Valve is also well known for its software distribution platform steam (released in 2002), and the Source engine (released in 2004).

Microsoft Corporation is an
American multinational software corporation headquartered in Redmond, Washington that develops, manufactures, licenses, and supports a wide range of products and services related to computing.
The company was founded by Bill Gates and Paul
Allen on April 4, 1975. Microsoft is the world's largest software maker measured by revenues. It is also one of the world's most valuable companies.

Sony Corporation ( ソニー株式会
社 Sonī Kabushiki Gaisha ), commonly referred to as Sony, is a
Japanese multinational conglomerate corporati on headquartered in
Kōnan Minato, Tokyo, Japan. Its diversified business is primarily focused on the electronics, game, entertainment and financial services sectors. The company is one of the leading manufacturers of electronic products for the consumer and professional markets. Sony is ranked 87th on the 2012 list of Fortune Global 500.

Apple Inc., formerly Apple Computer, Inc., is an
American multinational corporation headquartered in Cupertino, California that designs, develops, and sells consumer electronics, computer software and personal computers. Its best-known hardware products are the Mac line of computers, the iPod music player, the iPhone smartphone, and the iPad tablet computer. Its consumer software includes the OSX and iOS operating systems, the iTunes media browser, the Safari web browser, and the iLife and iWork creativity and productivity suites.

Weebly is an American web-hosting service that features a "drag-and-drop" website builder. As of August 2013, Weebly hosts over 15 million sites, with a monthly rate of over 100 million unique visitors. The company is headquartered in
San Francisco. The company was originally founded by Chief executive officer (CEO) David
Rusenko, Chief technology officer (CTO) Chris
Fanini, and Chief operating officer (COO) Dan
Veltri. The startup competes with Wix.com, Webs, Yola, SnapPages, and other web-hosting and creation websites.

• http://en.wikipedia.org/wiki/Valve_Corporation
• http://en.wikipedia.org/wiki/Microsoft
• http://en.wikipedia.org/wiki/Sony
• http://en.wikipedia.org/wiki/Apple_Inc.
• http://en.wikipedia.org/wiki/Weebly
• http://en.wikipedia.org/wiki/Craigslist
• http://en.wikipedia.org/wiki/EBay
• http://en.wikipedia.org/wiki/Google
• http://en.wikipedia.org/wiki/Yahoo!